Patent US3684189A successfully refreshed from Google Patents.
US3684189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized fuel burner
Assignee: Zinklahoma Inc
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Filing: 1971-05-12
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Granted: 1972-08-15
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Expires: 1991-05-12
Abstract
Abstract This invention teaches the design of an improved pressurized fuel burner. The design provides an efficiency comparable to existing prior art burners but with a length of burner tube of the order of two-thirds the length of current prior art burner tubes. In this design the attachment of the burner tip is made simpler and cheaper than in conventional burners by welding the burner tip to a standard pipe adapted to snugly fit the burner tube at both inlet and outlet ends.
Inventors
- 👤 Robert D Reed
- 👤 John S Zink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/62; F23D14/64
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
In a fuel burner in which the pressure energy of the fuel is accelerated at high velocity through and from an orifice, and into a coaxial burner tube, said burner tube comprising, sequentially a fuel-inspirated air entry and mixing section, a throat of diameter D, and an expansion section terminating in a burner tip, the movement in said expansion section comprising: a. a first expansion section, downstream of said throat of conical bore of approximately 8 degrees included angle and length approximately 1.5D; b. a second expansion section downstream of said first of conical bore of approximately 16 degrees included angle and length approximately 2D; and c. a burner tip downstream of said second section.
Claim 2
Dependent Claim
115 words
In a fuel burner in which the pressure energy of the fuel is accelerated at high velocity through and from an orifice, and into a coaxial burner tube, said burner tube comprising, sequentially a fuel-inspirated air entry and mixing section, a throat of diameter D, and an expansion section terminating in a burner tip, the movement in said expansion section comprising: a. a first expansion section, downstream of said throat of conical bore of approximately 8 degrees included angle and length approximately 1.5D; b. a second expansion section downstream of said first of conical bore of approximately 16 degrees included angle and length approximately 2D; and c. a burner tip downstream of said second section.
Claim 3
Dependent Claim
40 words
The burner as in claim 1 wherein said burner tip includes a support pipe fitting the outer surface of said second section and extending the length of said burner tube and terminating on the outer surface of said entry section.
Claim 4
Dependent Claim
18 words
The burner as in claim 2 in which said burner tip means is welded to said pipe means.
Claim 5
Dependent Claim
18 words
The burner as in claim 1 in which said burner tube is substantially a single monolithic cast structure.
Claim 6
Dependent Claim
19 words
The burner as in claim 1 a further improvement of which said entry section comprises a smooth, curved, section.
Claim 7
Dependent Claim
19 words
The burner as in claim 1 a further improvement of which said entry section comprises a conical tapered section.
Claim 8
Dependent Claim
20 words
A burner as in claim 1 wherein said entry section converges to said throat diameter for a length approximately 1.3D.
Claim 9
Dependent Claim
24 words
A burner as in claim 1 wherein said fuel orifice is mounted at a distance approximately a distance D/4 upstream of said entry section.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |